MAX16913AGEE(2015) Просмотр технического описания (PDF) - Maxim Integrated

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MAX16913AGEE
(Rev.:2015)

Remote Antenna Current-Sense Amplifier and Switches

Maxim Integrated 

MAX16913/MAX16913A

Remote Antenna Current-Sense

Amplifier and Switches

TURN-ON WITH A HEAVY LOAD

2 x ISC

ISC

LOAD CURRENT

tBLANK

SHDN

SC

tRETRY

RETRY

TURN-ON INTO A TEMPORARY HEAVY LOAD

2 x ISC

ISC

LOAD CURRENT

tBLANK

tRETRY

SHDN

RETRY

SC

Figure 2. Overcurrent Timing Diagram

Thermal Shutdown

Thermal shutdown circuitry protects the devices from

overheating. The switch turns off immediately when the

junction temperature exceeds +150°C (min) (see Table

1). The switch turns on again after the device temperature

drops by approximately 15°C (typ).

Shutdown (SHDN)

The MAX16913/MAX16913A feature an active-high control

input (SHDN) to put the devices in a low-power shutdown

mode. The devices turn off and consume only 5μA (max) of

shutdown current when SHDN is driven high.

Undervoltage and Overvoltage Lockout

The MAX16913/MAX16913A include undervoltage circuitry

(UVLO) to prevent erroneous switch operation when the

input voltage goes below approximately 4.25V during

startup and brownout conditions. Input voltages of less

than 4.25V inhibit operation of the device by turning off

the internal charge pump and the switch. These devices

also feature an overvoltage lock-out (OVLO) threshold of

+21V (typ). When VIN is greater than VOVLO, the device

immediately turns off the switch and the internal charge

pump.

Internal Reference

The MAX16913/MAX16913A feature a +3V

bandgap reference output, stable over supply voltage and

temperature. For the MAX16913A, the reference

output is connected to the resistive divider which sets the

open-load threshold. The output impedance of the internal

reference is 5kΩ (typ).

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